﻿//调用方法:onclick="return Calendar('输入框ID');"
var MonthDNum = new Array(0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
var MonthText = new Array("", "一月", "二月", "三月", "四月", "五月", "六月", "七月", "八月", "九月", "十月", "十一月", "十二月");
var Calendar_obj, Calendar_obj2;
//var WriteHead=1;

document.write('<iframe style="position:absolute;width:206px;display:none;" name="divCalendar" id="divCalendar" frameborder="0" scrolling="no"></iframe>')

/*头部信息CSS及JS函数*/
var HeadMsg = '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">' +
'<html xmlns="http://www.w3.org/1999/xhtml">' +
'<meta http-equiv="Content-Type" content="text/html; charset=utf-8"><style type="text/css"><!--' +
'body,html{margin:0px;height:100%;background:#FFF;}a,li,input {font-family:"Verdana","Arial";font-size:12px;}' +
'a {height:18px;color:#000;padding-top:2px;text-decoration:none;display:block;}' +
'a:hover{height:17px;padding-top:1px;border:1px solid #000;background:#FFF;}' +
'.CurrentDate {height:17px;padding-top:1px;border:1px solid #000;background: #FFF;}' +
'ul{list-style:none;margin:0px;padding:0px;overflow:hidden;}' +
'ul li{float:left;margin-left:1px;padding-top:1px;display:inline;text-align:center;width:28px;height:20px;}' +
'#Tools {width:204px;background:#5563B0;padding:0px;}' +
'#Tools li{padding-bottom:1px;}' +
'#Tools a{color:#FFF;}' +
'#Tools a:hover{border:1px solid #2E3665;background:#979FCE;}' +
'#Title {width:204px;background:#CAD3E8;border-bottom:1px solid #000;}' +
'#Title li{height:16px;padding-top:2px;}' +
'#sYear,#sMonth {width:44px;height:16px;border:1px solid #88A9C9;border-right:0;padding-top:2px;}' +
'#SArr {width:19px;height:18px;background:#E2EBF4;font-size:10px;text-align:center;color:#5563B0;border:1px solid #88A9C9;border-left:0;margin-right:3px;cursor:pointer;}' +
'#Select {width:63px;border:1px solid #8AC;background:#FFF;height:146px;}' +
'#Select a{height:16px;padding-left:3px;}' +
'#Select a:hover{color:#000;background:#E2EBF4;padding-top:2px;border:0;}' +
'#Select #SelectBn {background:#C7CDEF;font-size:8px;line-height:7px;height:7px;text-align:center;color:#5563B0;}' +
'#Select #SelectBn:hover{background:#7682C1;color:#FFF;}#SArr,#sYear,#sMonth{float:left;}' +
'#SelectYear,#SelectMonth{position:absolute;top:21px;z-index:1;overflow:hidden;display:none;}' +
'--></style><scr' +
'ipt language="JavaScript">var mdown,sy,ey,sm,em,HideSelect=1,CurrentSelect,year,month,day;function Scroll(str,key)' +
'{var Html="",s,e,obj,d;' +
'if(key=="Y"){s=sy;e=ey;obj="SelectYearItem";d="年";}if(key=="M"){s=sm;e=em;obj="SelectMonthItem";d="";}' +
'if(str=="Up"){s--;e--;}if(str=="Next"){s++;e++;}' +
'if(key=="Y"){sy=s;ey=e;}if(key=="M"){if(s<1)s=1;if(s>6)s=6;if(e<7)e=7;if(e>12)e=12;sm=s;em=e;}' +
'for(i=s;i<=e;i++){Html+=\'<a href="javascript:;" onclick="parent.Calendar_Modif(\';Html+=(key=="M")?year+\',\'+i+\',\'+day+\');">\'+parent.MonthText[i]:i+\',\'+month+\',\'+day+\');">\'+i;Html+=d+"</a>";}' +
'document.getElementById(obj).innerHTML=Html;}' +
'function KeyDown(str){if(str==38){Scroll("Up",CurrentSelect);}if(str==40){Scroll("Next",CurrentSelect);}}' +
'function ShowSelect(str,str2){HideSelect=0;HSelect();Scroll(\'\',str2);document.getElementById(str).style.display="block";CurrentSelect=str2}' +
'function HSelect(){document.getElementById("SelectYear").style.display="none";document.getElementById("SelectMonth").style.display="none";}' +
'function Calendar_GetDate(y,m,d)' +
'{var objEvent=window.event||arguments.callee.caller.arguments[0];' +
'var srcElement=objEvent.srcElement;' +
'if(!srcElement){srcElement=objEvent.target;}' +
'if(srcElement.tagName=="A"){parent.Calendar_GetDate(y,m,srcElement.innerHTML);}}' +
'document.onclick=function(){if(HideSelect){HSelect();}HideSelect=1;}</scr' +
'ipt><body onkeydown="KeyDown(event.keyCode);">' +
'<div id="SelectYear" style="left:31px;" onclick="ShowSelect(\'SelectYear\',\'Y\');"><div id="Select"><a href="javascript:;" onmousedown="mdown=window.setInterval(\'Scroll(\\\'Up\\\',\\\'Y\\\')\',50);" onmouseup="window.clearInterval(mdown);" onmouseout="window.clearInterval(mdown);" id="SelectBn" style="border-bottom:1px solid #5563B0;"><font face="Webdings">5</font></a><div id="SelectYearItem">' +
'</div><a href="javascript:;" onmousedown="mdown=window.setInterval(\'Scroll(\\\'Next\\\',\\\'Y\\\')\',50);" onmouseup="window.clearInterval(mdown);" onmouseout="window.clearInterval(mdown);" id="SelectBn" style="border-top:1px solid #5563B0;"><font face="Webdings">6</font></a></div></div>' +
'<div id="SelectMonth" style="left:99px;" onclick="ShowSelect(\'SelectMonth\',\'M\');"><div id="Select"><a href="javascript:;" onmousedown="mdown=window.setInterval(\'Scroll(\\\'Up\\\',\\\'M\\\')\',50);" onmouseup="window.clearInterval(mdown);" onmouseout="window.clearInterval(mdown);" id="SelectBn" style="border-bottom:1px solid #5563B0;"><font face="Webdings">5</font></a><div id="SelectMonthItem">' +
'</div><a href="javascript:;" onmousedown="mdown=window.setInterval(\'Scroll(\\\'Next\\\',\\\'M\\\')\',50);" onmouseup="window.clearInterval(mdown);" onmouseout="window.clearInterval(mdown);" id="SelectBn" style="border-top:1px solid #5563B0;"><font face="Webdings">6</font></a></div></div>';


function Calendar_Show(year, month, day) {
    var content;
    var date = new Date();

    var DayNum = (IsLeapYear(year) && month == 2) ? MonthDNum[month] + 1 : MonthDNum[month];
    var date2 = new Date(year, month - 1, 1)
    var start = date2.getDay();
    var date2 = null;
    var Trn = Math.ceil((DayNum + start) / 7);

    var PrNum = 1;

    content = '<scr' +
 'ipt language="JavaScript">year=' + year + ',month=' + month + ',day=' + day + ',sy=year-3;ey=year+3;' +
 'sm=(month-3<1)?1:(+month-3>6)?6:month-3;' +
 'em=(month+3<7)?7:(month+3>12)?12:month+3;</scr' +
 'ipt><div style="border:1px solid #6A84C8;height:' + (64 + 21 * Trn) + 'px;"><ul><li style="background:#FFF;"></li>' +
 '<li style="width:144px;background:#FFF;padding-bottom:1px;" id="SelectArea"><div id="sYear" onclick="ShowSelect(\'SelectYear\',\'Y\');">' + year + '年</div><div id="SArr" onclick="ShowSelect(\'SelectYear\',\'Y\');"><font face="Webdings">6</font></div>' +
 '<div id="sMonth" onclick="ShowSelect(\'SelectMonth\',\'M\');">' + MonthText[month] + '</div><div id="SArr" onclick="ShowSelect(\'SelectMonth\',\'M\');"><font face="Webdings">6</font></div>';



    content += '</li>' +
 '<li><a href="javascript:parent.Calendar_hide();">×</a></li></ul>' +
 '<div id="Tools"><ul>' +
 '<li><a href="javascript:parent.Calendar_Modif(' + (year - 1) + ',' + month + ',' + day + ');">«</a></li>' +
 '<li><a href="javascript:parent.Calendar_Modif(' + year + ',' + (month - 1) + ',' + day + ')";>‹</a></li>';

    if (Calendar_obj2) {
        content += '<li style="width:42px;"><a href="javascript:parent.Calendar_GetDate(' + year + ',' + month + ',0);">本月</a></li>' +
 '<li style="width:43px;"><a href="javascript:parent.Calendar_GetDate(' + date.getFullYear() + ',' + (date.getMonth() + 1) + ',' + date.getDate() + ');">本日</a></li>';
    }
    else { content += '<li style="width:86px;"><a href="javascript:parent.Calendar_GetDate(' + date.getFullYear() + ',' + (date.getMonth() + 1) + ',' + date.getDate() + ');">选择本日</a></li>'; }

    content += '<li><a href="javascript:parent.Calendar_Modif(' + year + ',' + (month + 1) + ',' + day + ');">›</a></li>' +
 '<li><a href="javascript:parent.Calendar_Modif(' + (year + 1) + ',' + month + ',' + day + ');">»</a></li>' +
 '</ul></div>' +
 '<div id="Title"><ul><li style="color:#F00;">日</li><li>一</li><li>二</li><li>三</li><li>四</li><li>五</li><li style="color:#F00;">六</li></ul></div>' +
 '<ul onClick="javascript:Calendar_GetDate(' + year + ',' + month + ',-1);">';

    var date = null;

    if (start > 0) { content += '<li style="width:' + (start * 29 - 1) + 'px;"></li>'; }
    for (i = 1; i <= DayNum; i++) {
        content += '<li><a href="#"'
        content += (day == PrNum) ? ' class="CurrentDate"' : '';
        content += ((i + start) % 7 < 2) ? ' style="color:#F00;"' : '';
        content += '>' + PrNum + '</a></li>';
        PrNum++;
    }
    content += '</ul></div>';

    //层定位
    var Calendar = document.getElementById('divCalendar');


    Calendar.style.height = 66 + 21 * Trn + 'px';  //框架高度

    divCalendar.document.open()
    divCalendar.document.write(HeadMsg + content);
    divCalendar.document.close()

    var p = Calendar_obj;
    var eT = 0, eL = 0, eH = 0, dH = 0, sT = 0, eP = p
    while (p && p.tagName != "BODY") {
        eT += p.offsetTop;  //距窗口顶部距离
        eL += p.offsetLeft;  //距窗口左边距离
        p = p.offsetParent;
    }
    var eH = eP.offsetHeight;    //输入框高度 
    var eW = eP.offsetWidth;    //输入框宽度 
    var dH = Calendar.style.pixelHeight; //框架高度

    Calendar.style.top = (eT + dH > document.body.scrollHeight && eT - dH >= 0) ? eT - dH + 'px' : eT + eH + 'px';
    Calendar.style.left = (eL + 206 > document.body.scrollWidth && eL - 206 + eW >= 0) ? eL - 206 + eW + 'px' : eL + 'px';
    setTimeout("document.getElementById('divCalendar').style.display=''", 1);

}

/*是否润年*/
function IsLeapYear(y) {
    if (0 == y % 4 && ((y % 100 != 0) || (y % 400 == 0))) { return true; }
    else { return false; }
}


function Calendar_Modif(y, m, d) {
    if (m < 1) { m = 12; y = y - 1; }
    if (m > 12) { m = 1; y = y + 1; }
    var num = (IsLeapYear(y) && m == 2) ? MonthDNum[m] + 1 : MonthDNum[m];
    if (d > num) { d = num; }
    Calendar_Show(y, m, d)
}


function Calendar(obj, obj2) {

    var p = Calendar_obj = document.getElementById(obj);
    Calendar_obj2 = document.getElementById(obj2);

    var re = /\d{4}-\d{1,2}-\d{1,2}/;
    var arr, Sdate;
    arr = re.exec(Calendar_obj.value);
    if (arr != null) { Sdate = Calendar_obj.value; }
    else {
        var mydate = new Date();
        Sdate = mydate.getFullYear() + '-' + (mydate.getMonth() + 1) + '-' + mydate.getDate();
    }

    Sdate = Sdate.split("-");
    Calendar_Show(parseInt(Sdate[0]), parseInt(Sdate[1]), parseInt(Sdate[2]));
}

function Calendar_GetDate(y, m, d) {
    if (!Calendar_obj2 || d != 0) {
        if (d > 0) { Calendar_obj.value = y + '-' + m + '-' + d; }
        else {
            var objEvent = divCalendar.event || arguments.callee.caller.arguments[0];
            var srcElement = objEvent.srcElement;
            if (!srcElement) { srcElement = objEvent.target; }
            Calendar_obj.value = y + '-' + m + '-' + srcElement.innerHTML;
        }
    }
    else {
        if (IsLeapYear(y) && m == 2) { num = MonthDNum[m] + 1; }
        else { num = MonthDNum[m]; }
        Calendar_obj.value = y + '-' + m + '-1';
        Calendar_obj2.value = y + '-' + m + '-' + num;
    }


    Calendar_hide();
}

function Calendar_hide()
{ document.getElementById("divCalendar").style.display = "none"; }

document.onclick = Calendar_hide;